In recent years

the capacity of distribution substation is growing and electric load is mainly inductive in the industrial and residential electricity consumption.For improving transmission of active power and economic efficiency

more and more shunt compensation capacitors are used at substation.The discharge coil

surge arrester

the imbalance current transformer and the number of the support insulators are provided in the capacitor bank and

therefore

withstand voltage test of the capacitor bank is a complicated task.In this paper

a set of very practical empirical formula is summarized throughout field AC withstand voltage test of the number of capacitor banks.The wiring and operation process of field test are also explained in detail so to achieve more convenient

more comprehensive and more effective shunt compensation withstand voltage test on capacitor banks.